Which of the following is true about a molecule which contains two polar bonds which have the different degrees of polarity?
a. it will always be polar c. it will only be polar if it is bent
b. it will never be polar d. it will only be polar if it is linear - answer-A.
What is the molecular we...
CHEMISTRY CHAPTER 4 EXAMS
WITH WELL STRUCTURED
ANSWERS (CHEMISTRY)
Top doctor
EXAMINER
, Chemistry Chapter 4
Which of the following is true about a molecule which contains two polar bonds which have the
different degrees of polarity?
a. it will always be polar c. it will only be polar if it is bent
b. it will never be polar d. it will only be polar if it is linear - answer-A.
What is the molecular weight of ibuprofen, C13H18O2?
a. 29.0 amu c. 289.4 amu
b. 206.3 amu d. 377.7 amu - answer-B.
What is the formula weight of barium phosphate, Ba3(PO4) 2?
a. 232.3 amu c. 559.6 amu
b. 537.9 amu d. 601.9 amu - answer-D.
What is the formula weight ammonium carbonate, (NH4)2CO3?
a. 78.1 amu c. 108.4 amu
b. 96.1 amu d. 138.2 amu - answer-B.
Which of the following compounds has the largest formula weight?
a. KCl c. MgF2
b. NaCl d. BF3 - answer-A.
The mass of an atom of 12C is exactly 12 atomic mass units. Which of the following describes a mole of
12C atoms?
a. a sample which weighs exactly 12 atomic mass units
b. a sample which contains 6.02 x 1023 atoms of 12C
c. both a. and b.
d. Neither a. nor b. - answer-B.
What is the molar mass of water, H2O?
a. 17.01 g c. 17.01 amu
b. 18.02 g d. 18.02 amu - answer-B.
How many molecules are present in a mole of glucose, C6H12O6?
a. 6.92 x 10 -26 c. 6.02 x 1023
b. 3.34 x 1021 d. 1.44 x 1025 - answer-C.
A person drinks 1500 g of water, H2O, per day. How many moles is this?
a. 0.0120 c. 83.3
b. 8.33 d. 120.0 - answer-C.
How many moles of marble, CaCO3, are there in a 275 g piece of marble?
a. 4.57 x 10 -22 c. 2.75
b. 0.364 d. 275 - answer-C.
How many hydrogen atoms are there in 2.50 moles of C6H12O6?
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